If you are not using oar rights, the NRS Plastic Oar Stoppers will position and keep your oars where you want them to be. Use the large stoppers is you are using with NRS Molded Oar Sleeves. Small mounts directly on small-diameter shafts(1 3/8 in. - 1 5/8 in.), Regular mounts directly on Carlisle or Cataract shafts (1 7/8 in - 2 in), Large, for larger-diameter shafts, NRS Molded Oar Sleeves, or wraps (2 in - 2 1/4 in.)
Excellent product. Used it a couple of times, so far, so good!
Will work on the back up oar.